现代制造技术与装备1582023年第3期总第316期锂电池钢壳缩口工艺的有限元仿真陈腾飞1廖声超1朱发强2赵海超3赵鹏博4（1.珠海华冠科技股份有限公司，珠海519085；2.武汉科技大学机械自动化学院，武汉430081；3.燕山大学电气工程学院，秦皇岛066004；4.太原理工大学矿业工程学院，太原030000）摘要：钢壳缩口是圆柱锂电池制程中段的一道关键工艺，目标是将入壳工艺后的钢壳缩口，以免内部结构脱出。缩口过程涉及影响因素多，变形过程复杂。文章以有限元仿真为工具，采用隐式求解算法，对钢壳缩口过程进行动力学仿真。完整模拟缩口工艺过程，获得钢壳的变形和回弹，指导夹具的动作时序优化和初始公差设定。确定导杆的受力和变形情况，校验工艺过程中的安全性。仿真结果表明，夹具松弛后，钢壳会有0.02mm的回弹，夹具工作面设置+0.02～+0.04mm的公差可抵消部分回弹量。导杆在整个过程中最大受力为2738N，无安全风险。该方法将缩口工艺过程可视化，为优化工艺参数提供了重要指导。关键词：钢壳；缩口；有限元；动力学FiniteElementSimulationforSteelCase’sShrinkingTechnicofLithiumBatteryCHENTengfei1,LIAOShengchao1,ZHUFaqiang2,ZHAOHaichao3,ZHAOPengbo4(1.ZhuhaiHigrandTechnologyCo.,Ltd.,Zhuhai519085;2.SchoolofMechanicalAutomation,WuhanUniversityofScienceandTechnology,Wuhan430081;3.SchoolofElectricalEngineering,YanshanUniversity,Qinhuangdao066004;4.CollegeofMiningEngineering,TaiyuanUniversityofTechnology,Taiyuan030000)Abstract:Steelcase’sshrinkingisanimportanttechnicinmiddlemanufactureprocessofcylindricallithiumbatteryaimingtoshrinkthecaseafterinsertiontechnicincaseofescapeofinteriorstructures.Withtooloffiniteelementsimulation,implicitsolutionisadoptedtoperformdynamicsimulationforcase’sshrinkingprocess.Basedonacompletesimulationofshrinkingtechnicprocess,deformationandresilienceofthecaseisacquiredsoastoguidetime-sequenceoptimizationandorigintolerancesettingsofthefixture.Stressanddeformationoftheguider-barisacquiredtocheckthesecurityofthetechnicprocess.Thesimulationresultshowsaresilienceof0.02mmforthesteelcase.Atoleranceof+0.02～+0.04mmisrecommendedtocounteracttheresiliencepartially.Maxforceoftheguider-barduringthewholeprocessis2738Nandnosecurityriskis...
